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Natural regeneration and ecological recovery in Mau Forest complex, Kenya

机译:肯尼亚毛森林综合体的自然更新和生态恢复

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This study investigated natural ecological recovery in parts of Western and Southwestern blocks of theMauForestcomplex that had experienced varied levels of disturbance. The extent and speed of regeneration in the disturbed regions since the eviction of the setter population were not known. This study thus now provides current baseline data on plant distribution, germination of soil bank seeds, and soil nutrient content. The number of tree species recorded at different levels of disturbance were in increas- ing order: moderately disturbed (MDF) > undisturbed (UDF) > heavy disturbed forest (HDF). Forest clearing reduced forest basal area and forest stocking of big trees (dbh ≥40 cm) in the HDF by more than 4 and 6 times, respectively, than those in UDF. Tree importance values indicated a reduction in commercially valuable species in HDF. Early colonizers and fire tolerant species were predominant in the HDF whereas non-commercial species dominated MDF. Viable soil seed reserves decreased with soil depth in all forests but content between 0 -20 cmsoil depth showed a potential to support regeneration. Total N, organic C and available P decreased with increase in forest disturbance. Overall, the disturbed sites showed a general potential for ecological recovery and natural regeneration to UDF status.
机译:这项研究调查了MauForest复合体西部和西南部部分地区受到不同程度干扰的自然生态恢复。自从迁徙二传手种群以来,受灾地区的再生程度和速度尚不清楚。因此,这项研究现在提供有关植物分布,土壤库种子发芽和土壤养分含量的当前基准数据。在不同干扰水平下记录的树种数量按升序排列:中度干扰(MDF)>不受干扰(UDF)>重度干扰森林(HDF)。砍伐森林使高密度纤维板的森林基础面积和大树(dbh≥40cm)的森林蓄积分别比UDF减少了4倍和6倍。树木重要性值表明HDF中具有商业价值的树种减少了。在HDF中,早期殖民者和耐火物种占主导地位,而非商业物种则占MDF的主导地位。在所有森林中,可行的土壤种子储备量随土壤深度的增加而降低,但土壤深度在0 -20厘米之间的含量显示出支持再生的潜力。随着森林干扰的增加,总氮,有机碳和有效磷降低。总体而言,受干扰的地点显示出生态恢复和自然更新到UDF状态的一般潜力。

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